package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
   private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /*
    * 新增套餐
    * */
    public void savaWithFlavor(SetmealDTO setmealDTO) {
        //用完整的实体类来接收
        Setmeal setmeal=new Setmeal();
        //对象拷贝
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向表中插入数据
        setmealMapper.insert(setmeal);

        //获取生成的套餐Id
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);

    }
    /*
    *
    * 分页查询
    * */
    public PageResult PageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
         Page<SetmealVO> page = setmealMapper.PageQuery(setmealPageQueryDTO);

        //返回分页结果
        return new PageResult(page.getTotal(),page.getResult());
    }
    /*
    *
    * 批量删除套餐
    * */
    public void deleteBatch(List<Long> ids) {

        ids.forEach(id->{
            //先查询出关联的
            Setmeal setmeal = setmealMapper.getById(id);
            if (StatusConstant.ENABLE == setmeal.getStatus())
            {
                //起售中的套餐不能删除
                throw  new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }

        });
        ids.forEach(setmealId->{
            //删除套餐中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品对应关系表中的数据
            setmealDishMapper.deleteBySetmeal(setmealId);


        });


    }
    /*
     *
     * 根据id查询套餐和菜品的关系
     * 用于修改页面的数据回显
     * */
     public SetmealVO getById(Long id) {
     Setmeal setmeal=  setmealMapper.getById(id);
     List<SetmealDish> setmealDishes= setmealDishMapper.getBySetmealId(id);
         SetmealVO setmealVO = new SetmealVO();
         BeanUtils.copyProperties(setmeal,setmealVO);
         setmealVO.setSetmealDishes(setmealDishes);
         return setmealVO;
     }
     /*
     * 修改套餐
     * */
    public void update(SetmealDTO setmealDTO) {
        //DTO属性不够用Setmeal来接收
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //1执行修改表
        setmealMapper.update(setmeal);

        //套餐id
        Long setmealId = setmealDTO.getId();
        //删除套餐和菜品的对应关系，操作setmeal_dish表，将执行delete
        setmealDishMapper.deleteBySetmeal(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //3重新插入套餐和菜品的关联关系，操作setmeal——dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);


    }
    /*
    * 起售或停售菜品
    * */
    public void startOrStop(Integer status, Long id) {
    //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示“套餐内包含停售菜品，无法起售”

        if(status == StatusConstant.ENABLE)
        {
          List<Dish> dishList =  dishMapper.getBySetmealId(id);
          if (dishList != null && dishList.size()>0)
          {
              dishList.forEach(dish -> {
                  if (StatusConstant.DISABLE == dish.getStatus())
                  {
                      throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                  }
              });
          }
        }
       Setmeal setmeal= Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */

    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
